Divisible rim.



F. R. BARKER & GREENWOOD.

DIVISIBLE RIM.

APPLICATION FILED AUG. 24, 1910. 994,237, Patented June 6,1911.

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- FEEDER/1C B. BARKER, 015' BOSTON, AND JOSEPH GREENWOOD, F WALPOLE,

MASSACHUSETTS.

mv srnnn RIM.

Specification 'of Letters Patent. Patented June 6, 1911, Application filgd August 24, 1910. Serial No. 578,760.- 7

To all whom it may concern:

Be it known that we, FREDERIC R. BARKER,

special class commonly known to those skilled in the art as quick-detachable rims -but which might be more appropriately called divisible rims and which are used inconnection with pneumatic tires. In rims of this class there is provided a side ring or.

flange commonly called. a bead which is detachable from the rim to allow the tire to be removed from the rim in order that the inner tube may be removed from the outer casing or shoe for repair or replacement.

The object of our invention is to provide means whereby the detachable bead may be more quickly and conveniently removed and replaced than has been possible. in the use of devices of this class heretofore.

The object is further to provide a device of this class in which the device, though quickly detachable-at will, shall nevertheless be normally securely locked to the rim so that accidental removal shall be impossible.

To these ends, our inventionconsistsin the novel features of construction and in the combination and arrangement of parts set forth in the following specification and particularly pointed out in the claims. Referring to the drawing: Figure 1 is a 0 side elevation of a divisible rim embodying our invention showing the same in'connec- .tion with the wheel and tire, the hub and part of" the spokes being broken away; Fig. 2 .is an enlarged sectional view taken or line 2-2 of Fig. 1, looking in tho direction of the I arrows. Fig. 3 is "n enlarged detail side ele- :vation of a portion of the rim, tire and wheel showing the means for securing the bead to the rim. Fig. 4 is a sectionalview taken on 50. line 4:4 of Fig. 3,.looking the direction of the arrowson said line. Likenumeral's refer to like parts throughout-the a1 views of the drawing.

1 ti ;.drawing, 5 isa tire and 6a wheel lotlrl ofg which may be of any usual or de- I is provided on opp sired construction, the..wheel being provided" with a rim 7. Mounted on the rim 7 are two removable rings or flanges Sand 9 commonly called beads. Preferably, these beads are provided with lips'or flanges 10 and '11, respectively, which, when turned inwardly toward each other, as shown in Fig. 2, are adapted to receive a tire of the clencher type, and when reversed are adapted to receive a tire of the Dunlop type, and for this purpose the head 8 is provided also with a flange 12 which, when the bead is reversed from the position shown in Fig. 2, is

adapted to fit into a corresponding annular,

recess 13 provided .in the rim 7 The bead 9 is preferably provided with an annular 11p or projection 14 located in a corresponding annular groove 15 provided in the rim 7. The bead 9 is both radially andcircunr ferentially extensible and contractible and to this end is inter 'upted or split at 16 and iisite sides of this split or slot with lugs 17 and 18, these lugs being provided, respectively, with oppositely disposed recesses 19 and 20, preferably of the curved form shown in Fig. 3. The rim 7 is provided with suitable means such, for example, as an ear 21 having a rounded end fitting the recess 19 of the'lug 17 as shown in-Fig. 3, and to this car a pair of links 22 are pivoted upon a suitable pivot 23. To the other pair of ends of these links a-lever 24. is pivoted in any suitable manneras, for

example, by providing said lever with two integral bosses 25 extending through said links, as shown in Fig. 4. The lever 24 and links 22 constitute a toggle which although force at the free end of the lever 24 draws the lugs 17 and 18 together with a very powerful action.

The lever 24' may directly engagethe lug 18, if desired, but preferably said lever is provided with a roll 26 journaled thereon and fitting the curved recess 20, as shown in Fig. 3. Preferably,'the lever 24 is provided with a means of adjustment so that the distaz-ce between its axis and that point in the periphery of the roll 26 which engages the lug 18 may be varied and to thisend, said leverris preferably made in two parts 27 and 28, the part 27 being providedwith a shank 29 having screw-threaded engagement with the part 27, as shown particularly in Fig. 4:- Of course, when the part 27 is 10- requiring the exercise of only a moderate cated between the links 22, said part will be held against rotation with respect to the part 28, but when the part2? is withdrawn from between said links it may be rotated 5-0ne or more complete rotations as may be required in order to vary the length of the short arm of the lever 24 for the purpose of determining the distance to which the lugs 17 and 18 will be drawn toward each other, as will appear hereinafter. The longer arm 3 of the lever 24 which is preferably concavoconvex in cross section is also curved longitudinally concentric with the rim and fits a correspondingly shaped flange 30 in which the groove is formed.

The bead 9 is preferably elastic and is so constructed that when released it expands or, in other words, its diameter and circumference increase so that the lugs 17 and 1S spring apart in the manner indicated in dotted lines in Fig. 3. Consequently, if the lever 24 be swung from the position shown in full lines in Fig. 3 to the position shown in dotted lines therein, said lever will swing upon the lug 18 as a fulcrum and the links 22 will swing upon the lug 21 as a fulcrum in the manner indicated in dotted lines in Fig. 3, said'lever and link continuing to swing downwardly toward the left until the lugs 17 and 18 are freed so that they may be withdrawn upwardly through a slot 31 in the rim 7 through which they project. In this way, the bead 9 having been freed may be entirely removed from the rim 7 to permit the removal of the tire 5 by sliding the same laterally across the space previously occupied by said bead. The head is returned to its place by a reversal of the foregoing operation, it being understood that the roll 26 will be first positioned in the recess 20 in the lug l8 and the lever 24; will be swung upwardly toward the right into the position shown in full lines in Fig. 3, it being observed that when it reaches this position the axes of the pivots 23 and 25 and the axis of the roll 26 are approximately in a straight line, and, in practice, so nearly so as to practically lock the parts, in their normal position. As a further safeguard, however, the lever 24 may be provided with a suitable additional locking means such, for example, as a locking member 32 mounted upon a pivot 33 on said lever and having a shortarm 3& normally located in a recess 35 provided in a lug 36 on the rim 7. The locking member 32 may, if desired, be provided with an eye 37 into which the operators finger may be inserted in order to swing said member laterally to disengage it from the lug 36: If desired, the eye 37 may be made somewhat resilient and may be provided with a pair of detents 38, see Figs. 3 and 4, engaging the convexly curved surface of the lever 24 and thus acting to normally hold the locking member in longitudinal alinement with said guished from the slow and clumsy methods taching beads.

'bead provided with a pair of oppositely relever. These detents may be freed from the lever springing the locking member dow'nwardly'or by applying suliicient force to said member laterally to cause the detents to be freed from the lever by springing downwardly. This deviceprevents jarring and vibration from displacing the parts and consequently the bead is always securely locked when in its normal position and yet may be very rapidly and conveniently detached, since this is accomplished by merely unlocking the lever 24' and swinging the same inwardly toward the center of the wheel with a quick movement, as distinat present employed for attaching and de- Having thus described our invention, what we claim and desire by Letters Patent to secure is:

1. The combination of a rim provided with a slot, an expansible and contractible bead provided with a pair of lugs extending through said slot, and lever means 11k crumed on said rim and normally engaging one of said lugs as a fulcrum for drawing said lugs toward each other thereby to contract said bead.

2. The combination of a rim provided with a slot, an expansible and contractible bead provided with a pair of lugs extending through said slot, means on said rim engaging one of said lugs, a link pivoted at one end to said rim, and a lever pivoted to said link and connected to the other of said lugs whereby the latter of said lugs may be drawn toward the former.

3. The combination of a rim provided with a slot, an expansible and contractible cessed lugs extending through said slot,

-: means on said rim interengaging with the recess of one of said lugs, a lever interengaging with the recess of the other of said lugs, and means connecting sald lever with said rim and extending across said lugs whereby said lever is adapted to draw said lugs toward each other.

4. The combination with a rim, of an expansible and contractible ring provided with two lugs, lever means connected to said lugs for drawing the same toward each other thereby to contract said ring, and a roll on said lever means engaging one of said lugs.

5. The combination of a rim, an expansible and contractible ring mounted 'on said rim, a link pivoted to said rim, and a lever pivoted to said link and engaging saidring between the pivotal connectionsbetween said link and said lever and between {said link and said rim.

rim, a link pivoted to said rim, a lever piv- 1 oted 'to said link, a pair of lugs located between the pivots of said link, one of saidlugs being normally engaged by said lever and constituting a fulcrum therefor, and

means on said rim engaging the other of said lugs.

'saidlugs as a fulcrum.

8. The combination of a rim provided with a circumferential groove, and provided with a slot, a bead located in said groove and provided with a pair of lugs projecting through said slot,a link pivoted to said rim at one side of said lugs, a lever piv'oted between its ends to said link at the other side of said lugs and engaging the'nearer of said lugs as a fulcrum, and means pivoted on said lever and interengaging with said rim to lock said lever against swinging movement.

9. The combination of a rim provided with a circumferential groove, and provided with a slot, a bead located in said groove and having a pair of lugs projecting through said slot, a pair of links pivoted to y said rim and straddling said lugs, mean'son said rim engaging one of said lugs, and a lever interposed between and pivoted .be-'

tween its ends to said links and engaging the other of said lugs as a fulcrum.

10. The'combination' with a rim, of an 'expansible and contractible bead mounted on said'rim and having means to hold said rim and bead against relative circumferential movement in one direction and meansfor contracting said bead comprising a link and a lever pivoted to each other, said link ,v

being pivotally connected 'to said rim and said lever engaging a portion of said bead as a fulcrum between the ends of said link;

11. The combination with a rim, of an expansible and contractible bead mounted on said rim, and means .for contracting said bead comprising a link and a lever pivoted to each other and fulcrumed respectively on said rim and said head, 'said linkand said lever normally lying in the same plane.

In testimony set our hands in presence of two witnesses,

FREDERIG R. BARKER. JOSEPH GREENWOOD.- .Witnesses: l

LoUIs A. Jones, SYDNnr E. TAFT.

Copies of this patent may be obtained for five cents each, by' addressing the Commissioner-o! Patents, Washington, .D. 0.

whereof we have hereunto subscribing 

